Joseph gillet



No'. 65,268. Patented nec. s, |893. J. GILLET.

FRICTION PULLEY.

(Application filed Jan. 17, 1898.)

(No Model.)

NITEDv STATES PATENT Fries;

JOSEPH GILLET, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE MIL- WAUKEE MANUFACTURING COMPANY, OF SAME PLACE.

FRICTION-PULLEY.

SPECIFICATION forming part of Letters Patent No. 615,268, dated December 6, 1898.

Application filed January 17, 1898. Serial No. 666,885. (No model.)

To a/ZZ whom t may concern.-

Be it known that I, JOSEPH GILLET, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Friction Pulleys, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

My invention has relation to improvements in friction-pulleys of that class designed for starting, stopping, and reversing rotary motion.

It is the object ofthe invention to provide an improved form of pulley-clutch in which a simple means is employed for clutching and unclutching the pulley to the shaft and at the same time to provide for preventing the pivoted levers from iiying outwardly by centrifugal force, and thereby clutching the pulley at a time when it is desired that said pulley should remain loose on the shaft.

With the above primary objects in view the invention consists of the improved constructudinal movable part, showing the shaft inv section.

Referring to the drawings, the numeralt indicates a shaft on which is loosely mounted a pulley 5. ley from one point of the inner side of its periphery to the vopposite point thereof, but not connected to the pulley at either of said points. To this plate are pivoted the ringsegments 7 7'. The segment 7 is pivoted at the point 8 and the segment 7 at the point 8'. The unpivoted end of segment 7 is provided with an elongated slot 9, through which a screw-bolt 10 passes and enters the plate, and the ring-segment7' is provided at its unpivoted end with a similar elongated slot 9', to which a screw-bolt 10' passes and likewise enters the plate. Near the un pivoted ends of the segments 7 7' are formed, in the inner edges of said segments, recesses 11 1l', respectively'. The plate 6 is formed or provided with a projecting hub 12. Through this hub A plate G extends across the pulpass set-screws 13, which connect said hub to the shaft, and thus hold the hub and the plate from whichit projects to revolution with the shaft. The plate 6 is provided at diametrically opposite points with slots 11 11, which extend to the hub 12 and communicate with branch slots 15 15, running longitudinally of the hub.

Pivoted to the plate 6 are levers 16 16', the short arms of which extend into the recesses 11 11' of the segments 7 7. The inner ends of these levers are extended at right angles, as indicated by the numerals 17 17', respectively, and pass into the slotsl 15 of the hub.

Parts similar or substantially similar to those hereinbefore described have been before used in friction-pulleys, and hence I do not make any claim thereto, except in so far as they coact or combine with my improvements, which will now beA specifically described.

It will be noticed that opposite ends of the angular extension 17 of the lever 16 are formed with beveled edges 18 1S' and that the opposite ends of the angular extension 17 of lever 16 areformed, respectively, with Vreverselyarranged beveled edges 19 19.

Mounted on the shaft l is a sleeve 20. This sleeve is made rotatable with the shaft and is longitudinally movable thereon by means ofa feather 21 on the shaft engaging a complementary groove `of the sleeve. Lon gitudinal movement may be imparted to the sleeve by means of a lever`22, provided with a forked end, engaging an annular groove 23 in the sleeve.

'and register with the beveled edge v18 of the angular extension 17. The -extremity of the lower shorter branch arm 27 is formed with a beveled edge 30, which as the sleeve is moved toward the pulley is adapted to match and register with the beveled edge 18 of the an- IOO gular extension 17. The arm 25 is likewise formed with two branch arms 31 and 32, of similar construction to the arms 24 and 25- that is to say, arm 31 is provided with a straight edge 33, which edge in Fig. 2 is shown as resting on the under surface of the angular extension 17', and with a beveled surface 3l, which is adapted to register with the beveled end 19 of the angular extension 17', while the upper shorter arm 32 is provided at its extremity with a beveled edge 35, which is adapted to register with the beveled end 19 of the angular extension 17.

To limit the movement of the sleeve 20 in a direction away from the pulley, I mount on the shaft 4 a collar 36, held by means of a setscrew. Anothercollar37is similarlymounted on the shaft adjacent to the hub of the pulley and serves to prevent said pulley from endwise movement in one direction.

In the operation of my invention if it is supposed that the pulley is running loosely on the shaft e and it is desired to tighten or clutch said pulley to the shaft the sleeve 20, by means of the lever 22, is moved longitudinally on the shaft, so as to throw the arms of said sleeve toward the pulley. The straight edges 2S and 33 of the arms 26 and 31 will then ride along the corresponding surfaces of the angular extensions of the levers 16 16 and cause the beveled ends 30 and 35 of the arms 26 and 31 to engage the corresponding bevels 1S and 19 of the angular extensions. The slots 1l of the plate 6 of course offer no obstruction to the movement of the arms 26 and 31 in this direction. The effect of the engagement of the bevels just referred to is to turn the levers 16 16' on their pivots, (the angular extensions 17 and 17' passing into the spaces between the respective branch arms of the arms 24 and 25,) so that the short arms thereof will force apart the rings 7 7. This will necessarily expand the ring-segments until they bind against the inner surface of the periphery of the pulley, and thereby cause said pulley to rotate with the shaft et. On the reverse movement of the sleeve 2O the bevels 29 and 3i act on the beveled surfaces 1S' and 19' of the angular extensions of the lever, and thereby act to turn back the levers 16 16 to their normal positions, and consequently unclutch the segment-rin gs from engagement with the rim of the pulley, thereby permitting the pulley to be again loose on the shaft. The continued movement of the sleeve 20 will draw the straight edges 23 and .3 onto the corresponding edges of the angular extensions 17 and 17 to the positions shown in Fig. 2.

An important feature of my invention is the provision of the arms 26 and 31, which when the parts are unclutched and the pulley is therefore loose on the shaft hold the angular extensions of levers 16 16 down to place and prevent their swinging outwardly by centrifugal force, so as to turn said levers 16 1 V, and thus bind or clutch the segments 7 7 at a time when it is not desired that such segments should bind or the pulley rotate with the shaft. Springs for this purpose are objectionable, owing to the fact that in order to successfully prevent the turning of the levers when the pulley is loose Very sti springs are necessary, and consequently to force the sleeve 2O toward the pulley would require considerable power. Besides, springs very soon wearand lose their power. M y improved construction provides an absolute safeguard against the clutching of the segments at times when it is not desired that the clutching should be effected, and at the same time a free and easy movement of the sliding sleeve is obtainable.

What I claim as my invention is- 1. The combination, of a shaft, a pulley mounted loosely thereon, a plate mounted on the shaft and provided with a hub portion said hub portion having a groove or slot therein, a clutch member within the pulley and adapted to be engaged with and disengaged from the rim of the pulley, a lever pivoted to the plate and having one arm engaging the clutch member, a lon gitudinally-movable sleeve mounted on the shaft, and arms extending from said sleeve, the inner arm engaging the slot of the hub, and the outer arm adapted, when the pulley is unclutched, to bear against the inner end of the lever, and each of said arms provided with a beveled edge, the beveled edge of one arm adapted to engage a correspondingly-beveled edge of the inner end of the lever on the movement of the sleeve toward the pulley, whereby the lever is turned so as to throw the clutch member into engagement with the pulley, and the beveled edge of the other arm adapted to engage a registering bevel of the lever, in order to unclutch the clutch member from the pulley.

2. The combination, of a shaft, a pulley mounted loosely thereon, a plate mounted on the shaft, a clutch member within the pulley, a lever pivoted to the plate and having one arm engaging the clutch member, a longituh dinally-movable sleeve having an arm proA jecting therefrom, said arm adapted, when the clutch member is out of clutch to bear against the inner end of the lever and pre= vent the turning of said lever by centrifugal force, and means, when the sleeve is moved toward the pulley, for turning the lever on its pivot so as to throw the clutch member into engagement with the pulley, and, when the sleeve is moved away from the pulley, for turning the lever in the opposite direction to unclutch the clutch member.

3. The combination, of a shaft, a pulley mounted loosely thereon, a plate mounted on the shaft and provided with a hub, said hub portion having a groove or slot therein,cluteh segments Within the pulley and adapted to be engaged with and to be disengaged from the rim of the pulley, levers pivoted to the plate, and each having one arm engaging a clutchsegment, a longitudinally movable sleeve IOO IXO

arms adapted to engage a corresponding beveled edge of the inner end of the lever on the movement of the sleeve toward the pulley, whereby the lever is turned so as to throw the clutch-segments into engagement with the pulley, and the beveled edge of the other arm of each set adapted to'engage a registering bevel of the lever, in order to unelutch the segments from the pulley.

4. The combination, of a shaft, a pulley mounted loosely thereon, a plate mounted on the shaft and provided with a hub, said plates having slots at opposite points communicating with slots inthe hub, clutch-segments Within the pulley and adapted to be engaged with and to be disengaged from the rim of the pulley, levers pivoted tothe plate, and each having one arm engaging a clutch-segment, and the ends of its opposite arm provided with an extension at an angle therefrom, a longitudinally-movable sleeve mount ed on the shaft, and sets of arms extending from the sleeve, the inner arm of each set engaging the slot of the hub, and the outer arm of each set adapted, when the pulley is unelutehed, to bear against the angular end of the lever, and each arm ofv a set provided with a beveled edge, the beveled edge of one of said arms adapted to engage a Corresponding beveled edge of the angular end of the lever, on the movement of the sleeve toward the pulley, whereby the lever is turned so as to throw the clutch-segments into engagement with the pulley, the angular end of each lever after the disengagement of these bevels passing into an increased space between the arms of a set,^and the beveled edge of the other arm of each set adapted to engage a registering bevel of the angular extension of the lever, in order to unoluteh Ithe segments from the pulley.

In testimony whereof I affix my signature in presence of two Witnesses.

JOSEPH GILLET. Witnesses:

ARTHUR L. MoRsELL, ANNA V. FAUsT. 

